To say that Bruno was not the least bit concerned with Leon's death, which was revealed in the papers as an act of German artillery, was quite the understatement. If not for the fact that French propaganda had painted the failed general as Bruno's rival on the world stage, he would have forgotten all about the man.
Leon had not earned his position, he was given it because of Bruno's rapid rise. They needed a young face among the general staff, one with a good service record as an officer, and Leon's shared history with Bruno in the east gave him preference in this regard.
However, the man had proven to be volatile, quick to anger, extremely selfish, shortsighted, and incompetent on a scale larger than the command of a battalion, especially when given his own theater, albeit a minor one like Luxembourg to plot, and invade on his own.